What are the answers to the three questions on page 98 of the seventh grade math book published by Xinmin Education Press? Emergency, emergency, emergency - Training Enrollment Network

What are the answers to the three questions on page 98 of the seventh grade math book published by Xinmin Education Press? Emergency, emergency, emergency

① 3 times (3x+5) = 2 times (2x- 1)

9x+ 15=4x-2

9x-4x=-2- 15

5x=- 17

X=- 17/5

② -3(x-3)=3x+4

-3x+9=3x+4

-3x-3x=4-9

-6x=-5

③ 3(3y- 1)- 12=2(5y-7)

9y-3- 12 = 10y- 14

9y- 10y =- 14+3+ 12

-y= 1

y=- 1

④ 4(5y+4)+3(y- 1)=24-(5y-5)

20y+ 16+3y-3=24-5y+5

20y+3y+5y=24+5- 16+3

28y= 16

y = 4/7

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